Question

the wave frequency is where 1 hertz equals 1 wave passed a fixed point in 1 second.
Assume that 10 waves pass a fixed point in 5 seconds. What is the frequency of the waves in hertz?

Answer 1

                     (10 waves) / (5 sec) 

                 =  (10/5) (wave/sec)

                 =      2      per sec

                 =      2        Hz .